Regulator for anesthetic apparatus.



A. W. CASH.

REGULATOR FOR ANESTHETIC APPARATUS. APPLICATION FILED AUG. I2, I9I5.

Patented. Feb. 20, 1917.

3 SHEETS-SHEET I.

A. W; CASH. REGULATOR FOR ANESTHEIIC APPARATUS.

APPLICATION FILED AUG. l2. 1915. lw Patented Feb. 2o, 1917.

3 SHEETSSHEET 2.

mf W M A. W. CASH.

HGULATOR FOR ANESTHETIC APPARATUS. APPucATxoN FILED Aue. 12, |915.

3 SHEETS-SHEET 3.

Patented Feb. 20, 1917.

ARTHUR W. oAs'IJI, or nacAIaIIt, ILLINOIs ASSIGNOR T0 H. IVIUELLER`MANUFACTUR;

lING co., or DECATUR, ILLINOIS, A CORPORATION or ILLINOIS.

REGULATOR FOR ANESTHETIC APPARATUS.

marcata.

Specicatirs Patent. Paitmnljodl .IP-@1b. 2U, INEDIT..

Application led August 12, 1915. Serial No. 455,182.

To all whom t may concern:

Be it known that I, ARTHUR CASH, a

Apparatus, of which the following is a spec-,

ification.

` The present invention relates to apparatus for administering anesthetics, and has Jfor its object to ei'l'ect the automatic control and regulation of the flow of the anesthetic from the tank or carboy, in'which such gases are usually sol'd commercially, to the conthe form of a bag, and from such bag de-y liver the gases in suitable quantities to the inhaler. The 'gas in the tanks or carboys being under very high pressure, while that in the container, from which thenozzle of the inhaler draws its supply, is at a lower pressure, suitable reducing instrumentalities may be provided if necessary between the carboy and the container. s

My present invention contemplates the utilization of the distensible or expansible container as a regulating means for the flow of gas from the c arboy to such container, so that when the apparatus has been once set for a certain/pressure inthe container an automatic control is eiIected by the movements of the container as it expands and collapses, which will maintain always the-y same pressure from the tank or carboy into the container, provision being madev also whereby this may be varied to suit the needs of the work and the container pressure regulated atu will. l

In order that the invention may be clear to those skilledin the art, I have shown in the accompanyingy drawings one embodiment of my invention, although it will be understood that this illustration, and the Jfollowing description, isv in no sense restrictive, as it is obvious that mechanical expedients otherthan those herein disclosed may be utilized in working out my invention without departing `f/romj the principle thereof.

,In the` drawings z* FigureV l is a perspective view-of an ap.

paratus with which my invention may be' used.

Fig. 2,is a side elevation of my regulating device. y

Fig. 3 is a top plan view of the regulator shown in Fig. 2.

Fig. t is a cross sectional view on substantially the line ,1- 4 of Fig. 2.

9F ig. 5 is a vertical sectional view of the regulator. v Fig. 6 is a side elevation, partly in sect'io-n. l

Fig. 7 is a sectional view on substantially the line 77 of Fig. 5.

Fig. 8y is a view showing the mounting of one of the operating levers for the regulator.

Fig. 9 is a perspective View of the operating lever.

Fig. 10 is a sectional view of the double check valve lbetween the carboys and a container.

Referring to tne drawngs by numerals, like numbers indicating li Ie parts in the several views, 10 (Figrl) indicates any suit.- able support or standard for the apparatus, carrying at its upper end a Jframe comprising a central controller 11, which may'be of any suitable design and structure, from which controller ay plurality of inlet pipes 12 branch, and outlet'v .pipes (one being shown) 13 leading to any suitable inhaler as 11. rllhe pipes 12 leading fromthe controller communicatewith containers 15, these containers being shown in the present instance as expansible bags, two being shown, al`v`y though it is obvious that any number necessary or desired may be used.

rlhe container l5 will ordinarily be connected with the carboys 16 and 17 in any 'suitable manner, las forexample by the pipes 18, it being customary in certain classes of work to have two carboys, one'containing "nitrous oXid, and the other containing oxygen, so that either one or the other, or a mixture of the two, can be utilized, the gases being delivered from the carboys 16 and 17 to the container 15, Vfrom which they are emitted by the pipes 12 to the controller 11 where they are commingled, and thence by the outlet pipes 13 and inhaler 14 to the patient. The carboys may be conveniently carried by the 'cross arms 19 supported, as shown, on the ipe 12 adjacent the controller, and will `be provided with the usual outlet valves 20, as shown.

The pipes 18 deliver to the head 21 of the regulator, whichhead isV screw-threaded or otherwise hermetically secured to adepending pipe or nipple at the end. of the arm 12,

`the gas from the pipes 18 delivering, as

bears against a diaphragm cup or casing shown in the present embodiment, at theopposite sides of a T-shaped head 22, the leg of which is screwed in o the head 21 and delivers by passage 23 t rough a valve seat at the `lower end of the head 21. The T- shaped head 22 is preferably provided with the non-return 'check valves 24, as shown in Fig. 10, these valves being normally held 1n the position shown by the spring 25, which spring will yield and permit the valves to open under pressure coming from the carboys 16 and 17 but will elosethe nipples of the inlet pipes 18 under back pressure through the T-head. j.

The passage 23 delivers to a valve seat 26 formed in a recess in the 'lower part of the head 21, within which recess is located aspring valve 27, vthe spring 28 of whlch 29, which is connected with the head 21 by means of the diaphragm 30, the outer edge of which is clamped between the two-part casing 29, as shown in Figs.` 5 and 6, the inner edge of the ring-shaped diaphragm being clamped between a 'lange 31 formed at the lower end of the head v21 and aclamping ring 32, as shown? It will be seen that the diaphragm does not really function as the ordinary diaphragm, but forms a yielding connection between the head 21 and the casing29, so as to permit of relative movement thereof," and, furthermore, it` serves to seal the chamber 33 in the diaphragm casing against the escape of gases coming through the port 26 past the valve 27 from the passage 23. The .valve-27 is formed as shown in Fig. 7, so as to permit free pasf sage of the gas coming through the port 26 past the valve into the chamber 33.

screw-threaded section.' as best shown in Fig 5, on which is adjustably mounted a ring 36 provided with a flange 37. The said 5 ring 36 may be adjusted upwardly or downa convenient adjusting means I have shown in the present instance a ring cap 38 which fits over the upper end of the ring 36, and

is secured thereto in any suitable manner,

as by screws 39, which screws enter any one of a series of threaded holes 40 formed in the upper-face of the ring 36, so that adjustment of the cap ring 38 with respect to the ring 36 may be made, and the cap ring properly positioned. The said cap ring is provided with an operating handle 4l, and an index or pointer 42, which registers with a series of indicating marks on the exterior of the regulator head 2l (see Fi'g. 2), which indicating marks or graduations denote the delivery pressure in the container, and serve as a setting means for the regulator.

- Pivotally mounted on the diaphragm cap or casing 29 are a series of levers 43, the ends of which bear upon the flange 37 of the ring 36, and as these levers are tilted from the position shown in Fig. 5 to that shown in` Fig. 6, they bring about a relative movement between the regulator head 21 and the` casing 29, this being permitted by the loose diaphragm connection between the parts, thus permitting, in the position shown in Fig. 5, the valve 27 to open more or less under the pressure coming from the ca'rboys through the passage y23 to the port 26, or as shown in Fig. 6 closing the valve tightly so as to prevent the the container 15. l In order that the operation of the levers 43 will be automatic and directly controlled by the condition of the container` 15, the levers 43 are provided with depending arms 44 which, as shown in Fig. l, extend downwardly adjacent the container 15, said arms 44 preferably having the finger pieces or plates 45 at their lower ends to engage the container 15.\ As the container distends itwill be obvious the arms 44 will be thrown outwardly, as shown in Fig. 6, and the levers 43 will cause a relative movement of the regulator head 21 and diaphragm casing 29, tending to close the valve 27 and prevent the flow of gas from the carboys to the distended container. i In this position of regulator the ygas may pbe withdrawn from the container at th'e lower pressure, and will pass by way of passages 35 -in the nipple 34 past the valve 27 .and by passages 45 to the pipe 12 and the controller 11, from which in regulated pressure it will go to the inhaler 14.

As the container 15 collapses on the drawingout of the gas the arms 44 will fall, de-

creasing the power exerted on the levers 43,

passage of the gas to and releasing the valve 27 to permit the enc trance .of more gas from the carboys.

It will be seen that an automatic and very close regulatlon can thus beeffected, the

" regulator after having once been set operating to admit a certain pressure of gas to the container, which pressure will be maintained automatically. as the container 15 collapses or distends.

lVhile the levers 43 with their operatingl arms 44 may be mounted in any convenient manner, I haveshown in the present construction a simple and convenient mounting, and vone which lends itself to easy assemblage of ,the levers and the diaphragm casing. In this construction I provide the undercut ring 4G at the top of the diaphragm casing, having the cutaway seats ,47 to receive the levers 43, said levers being provided at their inner ends with the journals 48 which lie within the undercut ring, as shown in Fig. 4, and permit the free rocking movement of the levers. l

From the foregoing it will be seen that a regulating device for apparatus of this kind, o

flow through said passages, and automatic means to move said members relative to each other to govern the range of movement of said valve.

2. Pressure regulating means comprising relatively movable vmembers having Huid passages therethrough, a yielding connection betweenv said members, a valve to control floiv through said passages, and automatic means tomove said members relative to each other to govern the range of movement of said valve.

3. Pressure regulating means comprising relatively movable members having fluid passa ges therethrough, a yielding diaphragm connecting said members, a valve to control flow through said passages, and automatic means to move said` members relative lto each other to govern the range'of movement of said valve.

4. Pressure regulating means comprising relatively movable members having fluid through, a -movable member having fluid passages therethrough connected with said fixed member, a valve to control flow throughf to each other to govern the range of movement of said valve.

Pressure regulating means comprising relatively movable members having fluid passages therethrough, a valve to control floiv through said passages, an expanding container to which one of said members delivers, and means operated by said container S5 to move said members relative to each other to govern the range of movement of said valve.

8. Pressure regulating means comprising relatively movable members having fluid passages therethrough, a va-lve to control flow through said passages, an expanding container to which one of said members delivers, and lever mechanism operated by said container to move said members relative to each other to govern the range of movement of said valve,

9. Pressure regulating means comprising relatively movable members having fluid passages therethrough, a` valve to control flow through saidrpassages, an expanding container to which one of said members delivers, and levers carried by one of said members and operated by said container to move` said members relative to each other to govern the range of movement of said valve.

10. Pressure regulating means comprising relatively movable members having fluid passages therethrough, a valve to control flow through said passages, a distensible container tov which one of said members delivers, and levers engaging said distensible container to effect movement between said members and govern the range of movement of said valve as said container expands and collapses.

4l1. Ina fluid pressure regulator, and in combination, a member having aI fluid-re- Ceiving and a fluid-discharging passage therethrough, a valve controlling said fluidreceiving passage, va chambered\ member with which said valve member is movably connected having fluid passages therethrough, levers mounted on said chambered combination, a member having a fluid-re'- ceiving passage and a Huid-discharging passage therethrough, a valve seat at the lower end of said member,a valve in operative relation to said seat, a chambered member having a fluid passage therethrough, a flexible diaphragm connecting said valved member and said chambered member, levers mounted on saidchambered member and' adjustably engaged with said valved member, and means for automatically operating said levers to effect relative movement between said members and govern the range of movementof said valve.

13. Inafluid pressure regulator, and in combination, a member having a fluid-receiving passage and a fluid-discharging passage therethrough, a valve seat`at the lower end of said member, a valve mountedV therein, a chambered -member on which said valve rests having a fluid passage therethrough, a flexible, diaphragm connecting said members Land sealing said chamber, an

adjustable ringon said valved member, levers mounted on said chambered member and engaging said adjustable ring, and means for automatically operating said levers to eectl relative movement between said members and govern the range of movement of said valve.

14. In a fluid pressure regulator, and in combination, `a memberv having a fiuid-receiving passage and a fluid-discharging passage therethrough, a valve\seat at the lower end of said member, a valve mounted therein, a chambered member on which said valve rests having a fluid' passage therethrough, `a flexible diaphragm connecting said members and sealing said chamber, an adjustable ring on said valved member, a capV ring adjustably'mounted on said first named ring and having an index finger to register with an index on saidvalved member, leversvmounted on said chambered member andj engaging .said adjustable ring, and m'eans for automatically operatingsaid levers -to effect" relative movement :between said members and govern the range of movement of said valve.

15.' In a fluid pressure regulator, andin combinatiomtwo members having fluid passages therethrough and so connected as to permit relative movement, a valve between said members controlling a fluid passage, means for automatically effecting relative movement of said ,members to govern the range of 'movement ,of said valve, adjustable means for controlling the extent of movement of the members, and index means for setting said adjustable means.

16. In a fluid pressure regulator, and in combination, a member having a fluid-receiving passage and a fluid-discharging passage therethrough, a second member having a fluid passage therethrough and connected .for relative movement withsaid first named member, a valve between said members, au-

tomatically operated lever-mechanism for effecting relative movement ofl saidy mem 'bers to govern the range'- of movement of said valve, and a flanged ring adjustably -mounted on said first named member and engaged by said lever meehanlsm, and an in `ceiving passage and a fluid-discharging passage therethrough, a two-part chambered member surrounding said first named member,a valve between said members, a diaphragm clamped between the parts of said chambered member, means for connecting said first named member to said diaphragm centrally thereof, a flanged ring adjustably mounted on said first named member, levers pivoted on said chambered member andengaging at their inner ends said flangedl ring, and ardistensible container to operate said levers andeffect a relative movement between sa'id members to govern the range of movement of said valve.

18. In a fluid pressure regulator, and in combination, a member having fluid passages therethrough, a valved chamber in its lower end, a valve in said chamber controlling a fluid passage, a chambered member in which the valved end of said first named member is seated having fluid passages therethrough, aflexible ,diaphragm coupling said members and permitting relative movement thereof, a flanged lring adjustably threaded to said first amed member, lever seats formed on the top of said chambered member, levers mounted in said seats and engaging said adjustable ring, and fluid pressure actuated means to operate said levers to effect relative movement of said members and govern the range of movement of said valve. 4 j

19. In a fluid pressure regulator, and in combination, a fluid pressure receiving and delivering member, a second fluid pressure receiving and delivering member mcvably connected. with said first named member, a valve between said members governed by the relative movements thereof, an expansible container to which said regulator delivors, and lever mechanism operated by said expansible container toveflect relative movement of said members.

20. In a fluid-pressure regulator, and in combination, a member having a fluid-receiving passage, and a fluid discharge therethrough, a valve seat at the lower end of said member, a valve in operative relation to said seat, a chambered member having a fluid passage therethrough, a spring contacting with said valve and said chambered member, a flexible diaphragm, contacting with said valve member and said chambered member, levers mounted on the chambered member and adjustably engaged with the valve member, and means for automatically operating said levers to effect relative movement between said members and govern the range of movement of said valve.

21. In a fluid pressure regulator, andvin combination, a member having a fluid-receiving passage, and a fluid-discharging passage therethrough, a valve seat at the lower end of said member, a valve mounted therein, meansv connected to said valve to cushion its contact with the end ofthe luiddischarge passage, a ehambered member on which said valve rests having a fluid passage therethrough, a flexible diaphragm connecting said chambered member and the first-A mentloned member and'seallng said chamber, an adjustable ring on said valve member, levers mounted on said chambered member and enfrafrinfr said adustable rinop and D b b 1 2D means for automatically operating said levers to effect relative movement between said members and govern the range of movement of said valve. p

22. In a fluid-pressure regulator, and in combination, a member leading from the supply carboys, a one-way valve in the member, a second member connected to the lirst having a fluid-receiving passage and a lluiddischarge passage therethrough, a third member having a fluid passage therethrough and connected for relative movement with said secondnamed member, a valve between the second and third members, and automatically operated lever mechanism for ell'ecting relative movement of said second and third members to govern the range of movement of said valve.

23. In a fluid-pressure regulator, the combination of a supporting stand, carboys supported on said stand', pressure-regulating means connected to said carboys, members v operable by pressure l'or actuating the pressure regulating means, a mixing chamber for the vfluids delivered from the carboys, and a delivery tube leading from the mixing chamber.

24. In a fluid-pressure regulator, the combination of a supporting stand, a mixing chamber on said stand, a delivery tube lead ing from themixing chamber, pipes leading from the mixing chamber, supports on said pipes, carboys detachably supported on said supports, pressure-regulating means connected to said pipe, and means for controlling said regulating means.

25. In a fluid-pressure regulator,- the combination of a supporting stand, carboys supported `on said stand, `]{Jressure\regulating means connected to said carboys, members operable by pressure for actuating the pressure regulating means, a mixing chamber for the fluids delivered from thecarboys, a controller on said miXin chamber, and a delivery chamber.

26. In a fluid-pressure regulator, the combination of a supporting stand,- a mixing' chamber on said stand a controller 'on said mixing chamber, a delivery tube leading from the mixing chamber, pipes leading from the mixing chamber, supports on said pipes, carboys deta-chably supported on said supports, pressure-regulating meansl connected to said pipe, and means for controlling said regulating means.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses ARTHUR W. CASI-I.

Witnesses:

MABnL. MGINTYRE, CHARLES G. UER.

tube leading rom the mixing' 

